EVERYDAY SCIENCE

Detailed explanation-1: -Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal-specifically, iron and nickel. The shorthand used for the core’s iron-nickel alloys is simply the elements’ chemical symbols-NiFe. Elements that dissolve in iron, called siderophiles, are also found in the core.

Detailed explanation-2: -Earth’s outer core is a fluid layer about 2, 260 km (1, 400 mi) thick, composed of mostly iron and nickel that lies above Earth’s solid inner core and below its mantle.

Detailed explanation-3: -Iron, nickel, and other heavy metals like gold, are what makes up the core of the earth because they are the heaviest of the metals and so sank toward the center of the earth.

Detailed explanation-4: -Inner core: This is the central layer of Earth. It has the maximum temperature. This layer is made up of nickel-iron alloy. Thus, the inner core is made up of nickel and iron alloy.

Detailed explanation-5: -The inner core is believed to be composed of an iron–nickel alloy with some other elements. The temperature at the inner core’s surface is estimated to be approximately 5, 700 K (5, 430 °C; 9, 800 °F), which is about the temperature at the surface of the Sun.